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Passivate

[QQ-P-35C]

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Passivation is intended to improve the corrosion resistance of parts made from austenic, ferritic and artensitic corrosion-resistant steels of the 200, 300 and 400 series and precipitation hardened corrosion-resistant steels. Grades 440C may be exempt from passivation treatments at the discretion of the procuring activity. The type of passivating is alloy specific.

Type II: Medium temperature nitric acid solution with sodium dichromate additive.

Type VI: Low temperature nitric acid solution.

Type VII: Medium temperature nitric acid solution.

Type VIII: Medium temperature; high concentration nitric acid solution.